AUWiring

Load and demand calculators

Maximum demand, load schedules, demand factors, diversity factors, phase allocation, neutral-current and capacity worksheets for Australian installations.

  • 14 calculators
  • Australian workflow
  • 230/400 V a.c. context

Load and demand calculators project basis

Maximum demand, load schedules, demand factors, diversity factors, phase allocation, neutral-current and capacity worksheets for Australian installations. These calculators support Australian design, estimating, installation and verification preparation. Keep the circuit, equipment, route, supply arrangement and source data with the result before it is used in a project record.

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Confirm the nominal 230/400 V a.c. or project-specific voltage basis, 50 Hz context where applicable, phase arrangement, metric units, manufacturer information, DNSP or authority conditions and current project documents before applying a result.

Check entered values, supply arrangement, cable or equipment data, product limits, DNSP or authority conditions and review limits before using the result.

Records covered

  • Maximum demandEstimate demand for a switchboard or load schedule using transparent entered factors. Inputs: Load groups, phase arrangement, entered demand factors, supply voltage. Output: Worksheet estimate requiring current Wiring Rules, authority and DNSP review.
  • Load schedule builderSummarise entered load rows into connected, duty-adjusted and phase totals. Inputs: Schedule reference, row currents, quantities, duty factors and phase allocation. Output: Load schedule worksheet with phase totals and review margin.
  • Spare switchboard capacityCompare board capacity with existing demand, proposed load and future allowance. Inputs: Board capacity, existing demand, proposed load, future allowance and minimum spare target. Output: Capacity margin worksheet with remaining capacity and spare percentage.
  • Demand factor worksheetApply user-entered demand factors to connected load groups. Inputs: Load group currents, demand factors and source notes. Output: Adjusted demand worksheet with effective factor and source review prompts.
  • Diversity factor worksheetApply user-entered diversity factors to connected load groups. Inputs: Load group currents, diversity factors and source notes. Output: Diversified load worksheet with effective factor and source review prompts.
  • Neutral currentEstimate linear-load neutral current from entered L1, L2 and L3 current records. Inputs: Board reference, phase currents and neutral review limit. Output: Neutral-current worksheet with phase spread, neutral percentage and review margin.

Review before applying

Load and demand calculator results are preparation records. Keep entered values beside current Australian requirements, DNSP or authority conditions, manufacturer information and project documents before applying a result.

Recheck the selected calculator whenever the supply arrangement, equipment data, route length, tariff basis, measurement method or project document set changes.